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Honeywell DT90E1012 Digital Room Thermostat
|Price:||£28.74 & FREE Delivery in the UK. Details|
|You Save:||£14.90 (34%)|
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- Slim Modern Design
- Energy Saving TPI control
- 4 Year Battery Life
- Extra Large LCD
- Volt Free Connections
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The DT90E digital room themostat has been designed to provide automatic temperature control of gas or oil fired boiler systems, underfloor heating, electric heating and zoning systems. The DT90E has an ECO button energy saving feature which gives timed setback or boosts temperatures to reduce energy demand. This is a TPI (Time Proportional Integral) control product, which make boilers operate more efficiently and provide close accurate control.The 'OFF' setting can be used for frost or hypothermia protection, assuming the system time control is also switched on.
1 x DT90E1012 Stat
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Top Customer Reviews
The instructions supplied in the box are the installer instructions only, which are reasonable. However if you go to Honeywell you can download three different guides, installer guide, simple guide and user guide.
To help others changing from a mechanical stat, all you need to do identify the perm live (Term A) and switched live (Term B) of your system and connect them to A and B terminals. If you have a neutral at your stat, just park it and make safe in an insulated connection block or terminal. DO NOT park it on terminal C! (This is Normally Closed Termination A to C).
In operation has a nice clean click when calling for heat, but not to loud.
This is a good upgrade from a mechanical stat.
Simple diy fitting. Remember to turn power off at mains. Took all of 10 minutes. Luckily I had the old one powered by the 2 simple cables as well, 1 Red 1 Black. Straight swap and now the house feels so much better. Before it was either always too hot or too cold. Now it's just right.
Looks smart and easy to operate, all at such a reasonable price.
It is good but it makes, what I consider to be an awfully loud noise when it clicks on (and off). To give you an idea of how loud it is, we can hear it click from any room in our house, even with the internal doors closed. If you're a light sleeper - it will wake you up if it comes on at night. I did email Honeywell support about this thinking it could just be a faulty unit, however after some further research it turns out that this is how it was designed - I never heard back from Honeywell support either.
One other point to consider, this is branded as an Eco device which to a certain extent it is. The issue i have is that this is a manual setting, not an automatic one. So unless you want to be 'interactive' with this unit I'd suggest not paying the premium. Furthermore it does require batteries, if the batteries run out whilst you're away the unit will not work; although this is true for any of the LCD type thermostats.
I'm going to buy a plain 'ole simple unit that does not make a loud click and requires no batteries. They are much cheaper and more reliable. I think it's only fair not to buy a Honeywell unit either - I like to know that if I encounter a problem; there is technical support available.
Of course, if you really do want to buy this unit; I'd recommend a set of Ear plugs too. :)
Easy enough to install, the unit is standard size so easy to replace an existing. The stat simply wires in line with the live, providing a switched live return to timeswitch, so only a two wire installation (if earth and neutral exist in current stat, insulate them and tuck out the way). Included instructions are basic and mainly pictorial, but can be understood if user competent (if in doubt, get help).
The stat itself provides a good number of options in a hidden menu to set-up, although all the defaults work ok 'out the box'. You can set maximum temperature for example, ECO temp etc.
The stat is a doddle to operate, simply needing a press of either the up/down keys to adjust the target temperature required, and the display will show a flame symbol to illustrate if the heating is on, plus current room temperature.
ECO function works well too. The single ECO button is pressed to select a predefined temperature (which you can set to suit) and ECO then runs until turned off. Alternatively you have the option to use the up/down keys to set a timed range between one and 24 hours for ECO to run. So if set to 5hrs for example, ECO will automatically switch off after five hours and the stat will return to work as normal again.
This stat certainly controls the heating more efficiently that a mechanical device, as the switching threshold is far more accurate. The mechanical stats rely on the heating and cooling of a bi-met strip and suffer quite a lag in switching. Our heating has clearly run more consistently with this new digital thermostat.Read more ›
Most Recent Customer Reviews
Had one before in another house, so this is to replace a more basic one in my current house. I have yet to install it.Published 9 days ago by JohnH
Stupidly loud click on activation/ deactivation. Coming off the wall and going back as soon as I have another brand. Read morePublished 2 months ago by ajw_1974
Easy to install (a replacement for a thermo mechanical stat) and easy to use.Published 2 months ago by PB
Working with a Worcester Bosch Greenstar Combi Boiler. Early days but appears to be working much more efficiently than our old Drayton (mechanical) thermostat. Read morePublished 2 months ago by Mr I W Owen
I had an old analogue thermostat on the upstairs landing of our house. The result was that it was impossible to set the living room temerature at an acceptable level. Read morePublished 3 months ago by Al
Much closer control of central heating pump and therefore boiler firing so well pleased.Published 3 months ago by Hilly